The main harm of drinking more water in the middle of the night lies in affecting the quality of sleep, increasing the burden on the kidneys, aggravating the burden on the gastrointestinal tract, and inducing edema. 1. Impact on the quality of sleep: drinking more water in the middle of the night can easily lead to an increase in nocturia, which will directly affect the quality of sleep, and even lead to mental depression during the day. 2. Increase the burden on the kidneys: after drinking water, the formation of urine, which needs to be metabolized by the kidneys, so drinking more water in the middle of the night is likely to increase the burden on the kidneys. 3. Increase the burden on the gastrointestinal tract: Drinking a lot of water in the middle of the night is easy to produce the feeling of bloating, because a large amount of water will increase the burden on the gastrointestinal tract, and even trigger the symptoms of abdominal pain. 4. Induce edema: when you drink a lot of water in the middle of the night, because the metabolism at night is not as high as during the day, it may lead to excess water accumulation in the body’s loose tissues, such as eyelid edema, or facial edema and other symptoms. Before sleeping at night, it is recommended not to drink too much water, and usually pay attention to maintain a regular routine, and not to be overly excited before going to bed.